5. Using the U/u and D/d commands, verify the limits of the AFC tuning and fill in the
following table:
AFC % Measured Frequency (MHz)
-100% ______
0% ______
+100% ______
The 0% AFC value should be within approximately ±0.2 MHz of the center IF frequency
(for example, 30 MHz).
The values at ±100% should correspond to approximately ± 7 MHz of the center IF
frequency, or at the maximum span that is supported by the STALO; whichever is less.
6. Toggle the MFC mode to AFC:
a. Type: =
b. Verify that the terminal indicator changes from Manual toAFC.
7. Exit the Ps menu.
Checklist
Table 104 MFC Setup Checklist
Task Checked OK/Not OK Remarks
Test procedure completed successfully.
Parameters are set.
See 6.6 Ps — Plot Burst Spectra and AFC (page 137).
Test Passed
For Customer Date:
For Vaisala Date:
A.20 AFC Functional Test (Optional)
Test Goal
Verify that the AFC properly tracks the burst pulse frequency.
Test Equipment
KVM connected
Test Procedure
1. Enter the TTY setups through dspx.
2. Enter the Ps mode and observe the output on a display scope.
Appendix A – Installation and Test Procedures
359
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